<!DOCTYPE html>
<html lang="zh">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
    <script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
    <script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
    <title>发帖</title>
    <style>
    body{
        background-color: beige;
    }
    #operation{
        margin-left: 20%;
        width: 60%;
        height: 100%;
    }
    #operation>form{
        width: 120px;
    }
    </style>
</head>

<body>
    <div id="topTitle">
    </div>
    <div id="operation">
        <form action="#">
            标题:<br>
            <input type="text" name="title">
            <br>
            正文:<br>
            <input type="text" name="text" >
            <br><br>
            <input type="submit" value="发布"">
            </form> 
    </div>

</body>
</html>